"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : 极致RTO-数据库系统类
Case Name   : 开启极致RTO，备机进行failover过程中，备机异常退出，failover失败后恢复环境，重新failover成功后，还原主备，关闭极致RTO，主备数据一致
Create At   : 2020/10/15
Owner       : @peilinqian
Description :
    1、开启极致RTO
    2、备机进行failover
    3、备机数据库进程挂住kill - 9；查询备机数据数据进程状态
    4、验证failover结果
    5、failover后，重启主备；
    6、备机再次进行failover
    7、还原主备
    8、执行完成后，关闭极致RTO
    9、查询主备数据是否一致
Expect      :
    1、开启极致RTO成功
    2、备机开始进行failover
    3、备机数据库进程挂住kill - 9成功；查询备机数据数据进程状态
    4、验证failover结果可能成功，也可能失败
    5、failover后，重启主备成功；
    6、备机再次进行failover成功
    7、还原主备成功
    8、执行完成后，关闭极致RTO成功
    9、查询主备数据一致
History     :
    modified：2021-10-9 by 5328113;failover过程中，进行kill -9 备机故障，failover可能成功，
        去掉首次failover结果断言，只保证恢复集群后，failover成功即可
    modified：2021-4-22 by 5328113;状态结果查询方式变更，修改脚本；
    modified：2021-3-9 by 5328113;主备同步方法调用修改，增加超时等待时间；
    modified：2021-2-23 by 5328113;teardown中增加恢复主备操作
    modified：2021-2-5 by 5328113;guc参数还原时指定还原值
    modified：2020-11-18 by @peilinqian ；完善TPCC断言；
    modified：2021-1-28 by 5328113;删除start成功断言，删除不必要tpcc
"""

import time
import unittest

from testcase.utils.ComThread import ComThread
from testcase.utils.Common import Common
from testcase.utils.CommonSH import *
from testcase.utils.Constant import Constant
from testcase.utils.Logger import Logger
from yat.test import Node
from yat.test import macro


class ExtremeRto(unittest.TestCase):
    nodes_tuple = ('PrimaryDbUser', 'Standby1DbUser', 'Standby2DbUser')

    @RestartDbCluster(*nodes_tuple)
    def setUp(self):
        self.log = Logger()
        self.log.info('----Opengauss_Reliability_RTO_Dbsys_Case031:初始化----')

        self.pri_root = Node(node='PrimaryRoot')
        self.pri_dbuser = Node(node='PrimaryDbUser')
        self.sta1_root = Node(node='Standby1Root')
        self.sta1_dbuser = Node(node='Standby1DbUser')
        self.sta2_dbuser = Node(node='Standby2DbUser')
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.sta_1_sh = CommonSH('Standby1DbUser')
        self.sta_2_sh = CommonSH('Standby2DbUser')
        self.com = Common()
        self.constant = Constant()
        self.tpcc_path = macro.TPCC_PATH
        self.node_num = self.com.get_node_num(self.pri_root)
        self.log.info(self.node_num)
        self.max_time = 1200
        self.min_time = 300

    def test_main(self):
        try:
            self.log.info('----1、开启极致RTO----')
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'replication_type=1')
            self.assertTrue(msg)
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'recovery_parse_workers=4')
            self.assertTrue(msg)
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'recovery_redo_workers=4')
            self.assertTrue(msg)
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'hot_standby=off')
            self.assertTrue(msg)
            # 重启数据库配置文件生效
            self.pri_sh.stopDbCluster()
            time.sleep(2)
            self.pri_sh.startDbCluster()

            self.log.info('----查看主备是否同步----')
            self.pri_sh.check_location_consistency('primary',
                                                   self.node_num,
                                                   self.min_time)
            self.log.info('----查询主备状态----')
            status = self.pri_sh.getDbClusterStatus('status')
            self.assertTrue(status)

            self.log.info('----2、备机进行failover----')
            self.log.info('----2.1、主机数据库进行gs_ctl stop；----')
            stop_msg = self.pri_sh.stopDbInstance()
            self.assertIn(self.constant.GS_CTL_STOP_SUCCESS_MSG, stop_msg)

            self.log.info('----查询主备状态----')
            self.pri_sh.getDbClusterStatus('status')

            self.log.info('----2.2、备机进行failover----')
            success_msg = self.constant.FAILOVER_SUCCESS_MSG
            failover_thread = ComThread(self.sta_1_sh.executeGsctl,
                                        args=('failover',
                                              success_msg,
                                              '',
                                              False))
            failover_thread.setDaemon(True)
            failover_thread.start()

            self.log.info('----3、备机数据库进程挂住kill - 9；----')
            self.com.kill_pid_keyword('M standby', 9, self.sta1_dbuser)
            time.sleep(2)
            self.log.info('----查询备机数据数据进程状态----')
            db_process_cmd = 'ps ux | grep \'M standby\' | grep -v grep'
            self.log.info(db_process_cmd)
            db_process_result = self.sta1_dbuser.sh(db_process_cmd).result()
            self.log.info(db_process_result)

            self.log.info('----查询主备状态----')
            self.pri_sh.getDbClusterStatus('status')

            self.log.info('----4、验证failover结果----')
            failover_thread.join()
            failover_result = failover_thread.get_result()
            self.log.info(failover_result)

            self.log.info('----5、failover后，重启主备；----')
            self.pri_sh.stopDbCluster()
            time.sleep(2)
            self.pri_sh.startDbCluster()
            self.log.info('----等待主备同步----')
            self.pri_sh.check_location_consistency('primary',
                                                   self.node_num,
                                                   self.min_time)
            self.log.info('----查询主备状态；expect：成功----')
            status = self.pri_sh.getDbClusterStatus('status')
            self.assertTrue(status)

            self.log.info('----6、备机再次进行failover----')
            self.log.info('----6.1、主机数据库进行gs_ctl stop；----')
            stop_msg = self.pri_sh.stopDbInstance()
            self.assertIn(self.constant.GS_CTL_STOP_SUCCESS_MSG, stop_msg)

            self.log.info('----查询主备状态----')
            self.pri_sh.getDbClusterStatus('status')

            self.log.info('----6.2、备机再次进行failover----')
            success_msg = self.constant.FAILOVER_SUCCESS_MSG
            failover_result = self.sta_1_sh.executeGsctl('failover',
                                                         success_msg,
                                                         '', False)
            self.assertTrue(failover_result)

            self.log.info('----6.3、进行refresh----')
            refresh_msg = self.sta_1_sh.exec_refresh_conf()
            self.assertTrue(refresh_msg)

            self.log.info('----6.4、原主机以standby启动----')
            start_msg = self.pri_sh.startDbInstance('standby')
            self.assertIn(self.constant.RESTART_SUCCESS_MSG, start_msg)

            self.log.info('----查看主机query，同步是否正常----')
            self.sta_1_sh.check_location_consistency('primary',
                                                     self.node_num,
                                                     self.min_time)

            self.log.info('----查询主备状态----')
            status = self.pri_sh.getDbClusterStatus('status')
            self.assertTrue(status)

            self.log.info('----7、还原主备----')
            self.log.info('----7.1、新主机stop----')
            stop_msg = self.sta_1_sh.stopDbInstance()
            self.assertIn(self.constant.GS_CTL_STOP_SUCCESS_MSG, stop_msg)

            self.log.info('----7.2、新备机进行failover还原主备----')
            success_msg = self.constant.FAILOVER_SUCCESS_MSG
            failover_result = self.pri_sh.executeGsctl('failover',
                                                       success_msg,
                                                       '',
                                                       False)
            self.assertTrue(failover_result)

            self.log.info('----7.3、进行refresh----')
            refresh_msg = self.pri_sh.exec_refresh_conf()
            self.assertTrue(refresh_msg)

            self.log.info('----7.4、新主机以standby启动----')
            stop_msg = self.sta_1_sh.startDbInstance('standby')
            self.assertIn(self.constant.RESTART_SUCCESS_MSG, stop_msg)

            self.log.info('----查看主机query，同步是否正常----')
            self.pri_sh.check_location_consistency('primary',
                                                   self.node_num,
                                                   self.min_time)
            self.log.info('----查询主备状态----')
            status = self.pri_sh.getDbClusterStatus('status')
            self.assertTrue(status)

        finally:
            self.log.info('----8、执行完成后，关闭极致RTO----')
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'recovery_parse_workers = 1')
            self.assertTrue(msg)
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'recovery_redo_workers = 1')
            self.assertTrue(msg)
            msg = self.pri_sh.executeGsguc('set',
                                           self.constant.GSGUC_SUCCESS_MSG,
                                           'hot_standby=on')
            self.assertTrue(msg)
            # 重启数据库配置文件生效
            self.pri_sh.stopDbCluster()
            time.sleep(2)
            self.pri_sh.startDbCluster()

            # 校验备机是否完成数据同步
            self.log.info('校验备机是否完成数据同步')
            flag_1 = self.sta_1_sh.check_location_consistency('standby',
                                                              self.node_num,
                                                              self.min_time)
            self.assertTrue(flag_1)
            flag_2 = self.sta_2_sh.check_location_consistency('standby',
                                                              self.node_num,
                                                              self.min_time)
            self.assertTrue(flag_2)

            self.log.info('----9、查询主备数据是否一致----')
            nodes_tuple = (self.pri_dbuser,
                           self.sta1_dbuser,
                           self.sta2_dbuser)
            flag = self.com.check_data_sample_by_all(r'\d', *nodes_tuple)
            self.assertTrue(flag)

            table_dict = self.com.format_sql_result(
                self.pri_sh.executDbSql(r'\d'))
            table_name = table_dict.get('Name')
            for name in table_name:
                select_sql = f'select count(*) from {name};'
                flag = self.com.check_data_sample_by_all(select_sql,
                                                         *nodes_tuple)
                self.assertTrue(flag)

    def tearDown(self):
        self.log.info("----this is tearDown----")

        host_name = self.pri_root.sh('hostname').result()
        if self.pri_sh.check_whether_need_switch(host_name):
            self.log.info('----恢复主备关系----')
            if self.pri_sh.check_whether_need_build():
                self.log.info('如果备机无法恢复，需要重建备机')
                self.pri_sh.executeGsctl('build',
                                         self.constant.REBUILD_SUCCESS_MSG)
            self.log.info('---进行主备切换---')
            success_msg = self.constant.SWITCHOVER_SUCCESS_MSG
            result = self.pri_sh.executeGsctl('switchover', success_msg)
            self.log.info(result)
            result = self.pri_sh.exec_refresh_conf()
            self.log.info(result)

            self.log.info('----校验刷脏页是否完成----')
            self.pri_sh.check_whether_remain_dirty_page()

        self.log.info('----Opengauss_Reliability_RTO_Dbsys_Case031:执行完毕----')
